Chapter 2.8, Problem 3E

A news report states that minority children who take advanced mathematics courses in high school have a first-year GPA in college that is equivalent to that of white students. The newspaper columnist suggested that the lack of advanced mathematics courses in high school curriculums in inner-city schools was a major cause of the low college success rate of students from inner-city schools. What confounding variables may be present that invalidate the columnist’s conclusion?